Description
ARA-290, also known as cibinetide, is an 11-amino-acid linear peptide derived from the helix B region of erythropoietin (EPO). The literature sometimes refers to it as pyroglutamate helix B surface peptide (pHBSP). It was designed to retain certain tissue-protective signaling properties of EPO while lacking its effects on red blood cell production. Its sequence begins with pyroglutamic acid, a cyclized residue that blocks the N-terminus.
What is ARA-290?
Erythropoietin acts on two receptor types. The classical EPO receptor homodimer drives erythropoiesis, while a heteromeric complex of the EPO receptor and the beta common receptor (CD131), termed the innate repair receptor, has been linked to tissue-protective and anti-inflammatory signaling. ARA-290 was engineered to engage this second receptor selectively. In animal studies it did not raise hematocrit, which made it useful for isolating the non-hematopoietic side of EPO biology.
Preclinical research has examined ARA-290 in models of neuropathic pain, peripheral nerve injury, diabetes, and ischemia-reperfusion injury, with measurements of inflammatory cytokines and small nerve fiber density. Clinical investigations in sarcoidosis-associated small fiber neuropathy have added to its published record.
Research Applications
- Innate repair receptor (EPOR/CD131) signaling
- Neuropathic pain and nerve injury models
- Inflammatory cytokine modulation
- Ischemia-reperfusion tissue injury
- Metabolic and neural changes in diabetic rodent models
Product Specifications
- Available sizes: 8mg, 16mg
- Form: Lyophilized powder in sealed vial
- Origin: Helix B surface region of erythropoietin
- Purity: ≥99% (HPLC)
- Storage: Store lyophilized product at -20°C; protect from light
For research use only. Not for human or veterinary use. Not a drug, food, or cosmetic. Sold to qualified researchers for in-vitro and laboratory research.






